diff --git a/redox-rt/src/sys.rs b/redox-rt/src/sys.rs
index 05b039808d..80e3105662 100644
--- a/redox-rt/src/sys.rs
+++ b/redox-rt/src/sys.rs
@@ -564,6 +564,6 @@ pub fn fstat(fd: usize, stat: &mut syscall::Stat) -> Result<usize> {
 
 pub fn fcntl(fd: usize, cmd: usize, arg: usize) -> Result<usize> {
     let _siglock = tmp_disable_signals();
-    let guard = FdGuard::new(syscall::fcntl(fd, cmd, arg)).map_err(|e| Error::new(e.errno))?;
-    Ok(guard.as_raw_fd())
+    let raw_fd = syscall::fcntl(fd, cmd, arg)?;
+    Ok(FdGuard::new(raw_fd).as_raw_fd())
 }